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1.
Emerg Infect Dis ; 18(2): 279-82, 2012 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-22305114

RESUMO

We investigated an outbreak of non-O157 Shiga toxin-producing Escherichia coli at a high school in Minnesota, USA, in November 2010. Consuming undercooked venison and not washing hands after handling raw venison were associated with illness. E. coli O103:H2 and non-Shiga toxin-producing E. coli O145:NM were isolated from ill students and venison.


Assuntos
Surtos de Doenças , Infecções por Escherichia coli/epidemiologia , Doenças Transmitidas por Alimentos/epidemiologia , Carne/intoxicação , Escherichia coli Shiga Toxigênica/classificação , Adolescente , Animais , Estudos de Casos e Controles , Cervos , Diarreia/microbiologia , Infecções por Escherichia coli/microbiologia , Feminino , Doenças Transmitidas por Alimentos/microbiologia , Humanos , Masculino , Carne/microbiologia , Minnesota/epidemiologia , Sorotipagem , Toxina Shiga/genética , Escherichia coli Shiga Toxigênica/genética
2.
J Food Prot ; 75(2): 320-7, 2012 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-22289593

RESUMO

Traceback methods by state regulatory agencies were used to complement traditional epidemiological cluster investigation methods and confirmed hazelnuts (also referred to as filberts) as the vehicle in a multistate outbreak of Escherichia coli O157:H7 infections. Bulk in-shell hazelnut and mixed-nut purchase locations were identified during the initial epidemiological interviews. Based on purchase dates and case onset dates, regulators in Minnesota, Michigan, and Wisconsin traced product back through the supply chain. Six (86%) retail locations received the suspect hazelnut or mixed-nut shipments from a Minnesota distributor, with one retailer (14%) receiving products from a Wisconsin distributor. Both distributors received 100% of their bulk in-shell hazelnuts and mixed nuts from a distributor in California. The California distributor received 99% of their hazelnuts from a packing company in Oregon. The California distributor received the hazelnuts in 50-lb (22.7-kg) bags and either resold them without opening the bags or used the in-shell hazelnuts in the manufacture of their in-shell mixed nuts. Records at the packing company in Oregon were incomplete or lacked sufficient detail needed to identify a suspect farm or group of suspect farms. Laboratory samples collected from human cases and subsequently recalled product matched the outbreak pulsed-field gel electrophoresis subtype of E. coli O157:H7. Hazelnut harvesting practices create a plausible route of contamination from fecal matter from domestic ruminants or wild deer. This outbreak investigation demonstrates the use of product traceback data to rapidly test an epidemiological hypothesis.


Assuntos
Corylus/microbiologia , Infecções por Escherichia coli/epidemiologia , Escherichia coli O157/isolamento & purificação , Contaminação de Alimentos/análise , Doenças Transmitidas por Alimentos/epidemiologia , California , Surtos de Doenças , Infecções por Escherichia coli/microbiologia , Microbiologia de Alimentos , Doenças Transmitidas por Alimentos/microbiologia , Humanos , Oregon
3.
Emerg Infect Dis ; 16(11): 1678-85, 2010 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-21029524

RESUMO

We determined characteristics of Salmonella enterica pulsed-field gel electrophoresis clusters that predict their being solved (i.e., that result in identification of a confirmed outbreak). Clusters were investigated by the Minnesota Department of Health by using a dynamic iterative model. During 2001-2007, a total of 43 (12.5%) of 344 clusters were solved. Clusters of ≥4 isolates were more likely to be solved than clusters of 2 isolates. Clusters in which the first 3 case isolates were received at the Minnesota Department of Health within 7 days were more likely to be solved than were clusters in which the first 3 case isolates were received over a period >14 days. If resources do not permit investigation of all S. enterica pulsed-field gel electrophoresis clusters, investigation of clusters of ≥4 cases and clusters in which the first 3 case isolates were received at a public health laboratory within 7 days may improve outbreak investigations.


Assuntos
Eletroforese em Gel de Campo Pulsado , Infecções por Salmonella/epidemiologia , Infecções por Salmonella/microbiologia , Salmonella enterica/isolamento & purificação , Análise por Conglomerados , Surtos de Doenças , Humanos , Minnesota/epidemiologia , Administração em Saúde Pública , Salmonella enterica/classificação , Sensibilidade e Especificidade , Sorotipagem , Fatores de Tempo
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